"The geologic maps and geospatial data in this report show the distribution of bottom types, water depths, and surficial sediment texture over a large area of seafloor in Boston Harbor and the harbor approaches, Massachusetts"--DVD-ROM insert.

"The geologic maps and geospatial data in this report show the distribution of bottom types, water depths, and sediment thickness over a large area of seafloor between Nahant to Gloucester, Massachusetts"--DVD-ROM insert.